On stock springs, .480 is max.

 

How is it that you calculate that? Am I just over thinking this/not reading the specs enough? Also I just replaced my cat with a slip on magnaflow cat which was horrible I'm a welder by trade and know how to lay out pipe but underneath a truck trying to do all that bu youself is a different story, and when I looked into my old cat it was fine maybe just a little charcoal grey but not the huge black mess I expected after my plenum was blown apart for two years. And the plenum was horrible!!!!

 

Max lift is in the specs. Think you can look it up on the service manual.

 

Yup... and I think the .545" is max usable before interference with stock pistons.